The calculated distance (air line) between Bratislava and Hainburg an der Donau is approximately 7 miles respectively 12 kilometers.
By car or train, the actual journey to Hainburg an der Donau is certainly longer, as only the direct route (as the crow flies) between Bratislava and Hainburg an der Donau has been calculated here.
Air line (approximately)
12 kilometers
6 nautical miles